/Engine/Source/Editor/UnrealEd/Public/Kismet2/KismetEditorUtilities.h
Will add an event to a list of callbacks to occur post Blueprint creation if the Blueprint is a child of the class
static void RegisterOnBlueprintCreatedCallback ( void * InOwner, [UClass](API\Runtime\CoreUObject\UObject\UClass) * InTargetClass, [FOnBlueprintCreated](API\Editor\UnrealEd\Kismet2\FKismetEditorUtilities\FOnBlueprintCreated) InOnBlueprintCreatedCallback )